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US 1 (SR 5) over Long Key Channel

Monroe County, Florida · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

US 1 (SR 5) over Long Key Channel in Monroe County, Florida, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
It was built in 1981, making it 44 years old at the 2025 inventory.
It carries about 13,200 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 61 of the 98 inventoried bridges in Monroe County rated fair (62.2%); 5 (5.1%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Continuous prestressed concrete segmental box girder
Length	about 12,175 ft
Location	Long Key (mm 63.2)
NBI structure number	900094
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Florida department of transportation.

Bridge	Built	Vehicles/day	Condition
US 1 (SR 5) over Rockland Channel	1979	47,000	Good
US 1 (SR 5) over Salt Run	1992	38,500	Fair
US 1 (SR 5) over Naval Base Blvd	1988	27,500	Good
US 1 (SR 5) over Jewfish Creek	2008	26,500	Good
US 1 (NB & SB) over Manatee Creek	2008	26,500	Fair
US-1 (SR-5) over Vaca Cut	1982	25,000	Fair